<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Log
 * @subpackage Writer
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Stream.php 16219 2009-06-21 19:45:39Z thomas $
 */

/** Zend_Log_Writer_Abstract */
require_once 'Zend/Log/Writer/Abstract.php';

/** Zend_Log_Formatter_Simple */
require_once 'Zend/Log/Formatter/Simple.php';

/**
 * @category   Zend
 * @package    Zend_Log
 * @subpackage Writer
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Stream.php 16219 2009-06-21 19:45:39Z thomas $
 */
class Zend_Log_Writer_Stream extends Zend_Log_Writer_Abstract
{
	/**
	 * Holds the PHP stream to log to.
	 * @var null|stream
	 */
	protected $_stream = null;

	/**
	 * Class Constructor
	 *
	 * @param  streamOrUrl     Stream or URL to open as a stream
	 * @param  mode            Mode, only applicable if a URL is given
	 */
	public function __construct($streamOrUrl, $mode = 'a')
	{
		if (is_resource($streamOrUrl)) {
			if (get_resource_type($streamOrUrl) != 'stream') {
				require_once 'Zend/Log/Exception.php';
				throw new Zend_Log_Exception('Resource is not a stream');
			}

			if ($mode != 'a') {
				require_once 'Zend/Log/Exception.php';
				throw new Zend_Log_Exception('Mode cannot be changed on existing streams');
			}

			$this->_stream = $streamOrUrl;
		} else {
			if (! $this->_stream = @fopen($streamOrUrl, $mode, false)) {
				require_once 'Zend/Log/Exception.php';
				$msg = "\"$streamOrUrl\" cannot be opened with mode \"$mode\"";
				throw new Zend_Log_Exception($msg);
			}
		}

		$this->_formatter = new Zend_Log_Formatter_Simple();
	}

	/**
	 * Close the stream resource.
	 *
	 * @return void
	 */
	public function shutdown()
	{
		if (is_resource($this->_stream)) {
			fclose($this->_stream);
		}
	}

	/**
	 * Write a message to the log.
	 *
	 * @param  array  $event  event data
	 * @return void
	 */
	protected function _write($event)
	{
		$line = $this->_formatter->format($event);

		if (false === @fwrite($this->_stream, $line)) {
			require_once 'Zend/Log/Exception.php';
			throw new Zend_Log_Exception("Unable to write to stream");
		}
	}

}
